Maps
The Yuxi Circle: The World’s Most Densely Populated Area
The Yuxi Circle: The World’s Most Densely Populated Area
If you wanted to capture over 55% of the global population inside a circle with a 4,000km radius, which city would you place at its epicenter?
In 2013, a post appeared on Reddit marking a circular area of the globe with “more people living inside this circle than outside of it.” The circle had a radius of 4,000 km (just under 2,500 miles) and was named the Valeriepieris circle after author Ken Myers’ username.
Acknowledging that the Valeriepieris circle is not actually a circle (it was drawn on a two-dimensional map rather than a globe) and is based on data that has become outdated, mapmaker Alasdair Rae went digging and discovered what he calls The Yuxi Circle, the world’s most densely populated area.
Introducing the Yuxi Circle
Rae traced circles around 1,500 cities worldwide to find out how many people lived within a 4,000 km radius, just like the original Valeriepieris circle. He based his calculations on WorldPop data from 2020, based on a global population of 7.8 billion people.
Of the 1,500 circles that Rae made calculations for, 148 contained populations of 4 billion or more. He found many examples in Asia including in China, Myanmar (Mandalay), Laos (Vientiane), Bangladesh (Chattogram), India (Agartala), Bhutan (Thimpu), and Vietnam (Hanoi) to name a few.
But of them all, Yuxi, a city in the Yunnan province of China, has the largest population living within a 4,000 km radius: 4.32 billion.
Put another way? The circle encompasses over 55% of the world’s population, despite including desolate areas like the Taklamakan Desert, the Tibetan Plateau, Mongolia, and Southern Siberia.
Densely Populated Areas Around the Globe
Rae’s search for densely populated clusters also turned up notable circles beyond Asia. They surrounded cities like Cairo, Paris, and Mexico City.
Note: Keep in mind that the white lines on the flat maps are equidistant circles but will only look like circles when plotted on a globe.
Circling Hanoi yields a population of 4.27 billion (54% of the global population). It was the runner up city circle in Rae’s original search.
Circling Cairo yields a population of 2.29 billion. This circle reaches most of Europe while still containing populated areas of India, Pakistan, and Africa.
Comparatively, circling Paris yields a population of 1.19 billion. This Euro-centric circle contains large tracts of water and scarcely populated islands such as Iceland and Greenland.
Across the Atlantic, circling Mexico City yields a population of 0.73 billion. It’s significantly smaller than the other circles, as the total population in the Americas is concentrated in just three countries, the U.S., Mexico, and Brazil (not included in this circle).
It’s worth noting that the Valeriepieris circle also inspired other people to look at population density in different ways. In 2015, Danny Quah of the London School of Economics looked more closely at the Valeriepieris circle and was inspired to find the smallest circle with more people living inside of it than outside. He determined that a circle with a radius of 3,300 km centered near Mong Khet, Myanmar was “the world’s tightest cluster of people.”
While the Yuxi Circle contains the largest population using Rae’s approach as of early 2022, global populations are constantly changing. Who knows where the next Yuxi Circle will be?
This article was published as a part of Visual Capitalist's Creator Program, which features data-driven visuals from some of our favorite Creators around the world.
Mapped: The World’s Largest Armies in 2024
This was originally posted on our Voronoi app. Download the app for free on iOS or Android and discover incredible data-driven charts from a variety of trusted sources.
Despite being considered the biggest military force in the world, the United States doesn’t have the largest army in terms of personnel.
This graphic shows the top 10 countries by military personnel as of May 2024, including active and reserve personnel, as well as paramilitary forces. It is based on estimates from GlobalFirepower.com.
Vietnam, India, and South Korea Have the Biggest Armies
China has the largest standing army, with over 2 million active personnel. With increasing defense spending over the last decades, the country also ranks third in the number of tanks and second in the number of aircraft carriers in service.
When reserve personnel are included, however, the Chinese military falls behind those of Vietnam, India, South Korea, and Russia.
Vietnam’s forces include 600,000 active personnel and over 5 million in reserve. This is because Vietnam, along with countries like South Korea and Israel, has a standing policy of conscription for young adults.
Country | Total Military Personnel (est.) | Region |
---|---|---|
🇻🇳 Vietnam | 5.8M | Asia |
🇮🇳 India | 5.1M | Asia |
🇰🇷 South Korea | 3.8M | Asia |
🇷🇺 Russia | 3.6M | Europe/Asia |
🇨🇳 China | 3.2M | Asia |
🇺🇦 Ukraine | 2.2M | Europe |
🇺🇸 United States | 2.1M | North America |
🇰🇵 North Korea | 2.0M | Asia |
🇵🇰 Pakistan | 1.7M | Asia |
🇮🇷 Iran | 1.2M | Middle East |
Interestingly, the 2022 Russian invasion of Ukraine resulted in a massive increase in Ukrainian personnel numbers. Active personnel rose from around 170,000 in 2016 to over 900,000.
Despite not having the largest army, the U.S. accounts for almost 40% of global military expenditures, with its 2022 spending totaling $877 billion.
China ranked second in absolute terms, accounting for another 13% of world military expenditure at $292 billion.
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